Dr. Mercola Calcium With Vitamins D & K2 supplement bottle
Dr. Mercola

Calcium With Vitamins D & K2 Review

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 6 brand certifications checked · Last updated: Aug 2026
91
Product Score Excellent
86
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D (as Cholecalciferol, Vitamin D3) 4000 IU 1000%
Vitamin K (as Chickpea, Menaquinone-7) 120 mcg 150%
Calcium (as Eggshell) 175 mg 20%
Bioavailability Excellent

Absorption Rating

  • Vitamin D (as Cholecalciferol, Vitamin D3) Good
  • Vitamin K (as Chickpea, Menaquinone-7) Good
  • Calcium (as Eggshell) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Capsule
  • Calcium Laurate
  • Silicon Dioxide
Efficacy Good

Dosage Analysis

  • Vitamin D (as Cholecalciferol, Vitamin D3) 4000 IU Effective
  • Vitamin K (as Chickpea, Menaquinone-7) 120 mcg Effective
  • Calcium (as Eggshell) 175 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D (as Cholecalciferol, Vitamin D3) 4000 IU 1000%
Vitamin K (as Chickpea, Menaquinone-7) 120 mcg 150%
Calcium (as Eggshell) 175 mg 20%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Capsule Unknown
Calcium Laurate Generally_safe

It helps to bind ingredients together and prevent separation.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Dr. Mercola

Founded 1997 · Cape Coral, Florida, USA · 319 products · mercola.com/

Certifications

6 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source
NSF Certified for Sport Verified
NSF Contents Certified Verified

Transparency

3 claims
Third Party Testing Claim — Verified Source
Contains Proprietary Blend — True

Violation History

8 incidents
Prop 65 Lead2025-04-18Source
Lawsuit Wrongful termination and breach of a severance contract by the former CEO.2024Source
Fda Warning Unapproved and misbranded products related to Coronavirus Disease 2019 (COVID-19).2021-02-18Source
Lawsuit False and unsupported claims that its indoor tanning systems are safe and do not increase the risk of skin cancer.2016Source
Fda Warning Illegal marketing of a medical device.2011-01-01Source
Fda Warning Illegal drug claims for various supplements.2006-01-01Source
Fda Warning Illegal drug claims for various supplements.2005-01-01Source
Fda Warning Letter FDA Warning LetterSource
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Frequently Asked Questions
Is Dr. Mercola Calcium With Vitamins D & K2 a good supplement?

Dr. Mercola Calcium With Vitamins D & K2 received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients with 30 servings per container. Of the 4 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Dr. Mercola, holds a brand trust score of 86/100 with 6 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections.

What are the ingredients in Dr. Mercola Calcium With Vitamins D & K2?

Dr. Mercola Calcium With Vitamins D & K2 contains 3 active ingredients: Vitamin D (as Cholecalciferol, Vitamin D3) (4000 IU), Vitamin K (as Chickpea, Menaquinone-7) (120 mcg), Calcium (as Eggshell) (175 mg). Notable high-dose ingredients include Vitamin D at 1000% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Dr. Mercola Calcium With Vitamins D & K2 safe to take?

Dr. Mercola Calcium With Vitamins D & K2 has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Dr. Mercola a trustworthy supplement brand?

Dr. Mercola receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1997 and headquartered in Cape Coral, Florida, USA, the company offers 319 products in their lineup. They hold 6 verified certifications including Consumerlab, Nsf Gmp, Usda Organic, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Dr. Mercola has 8 historical regulatory incidents on record, which are factored into the trust score.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.